Verses including the word Remorse

Then Allah sent a raven, who scratched the ground, to show him how to hide the shame of his brother."Woe is me!" said he; "Was I not even able to be as this raven, and to hide the shame of my brother?" then he became full of regrets- (Surah Al-Maida, 31)

Every soul that hath sinned, if it possessed all that is on earth, would fain give it in ransom: They would declare (their) repentance when they see the penalty: but the judgment between them will be with justice, and no wrong will be done unto them. (Surah Yunus, 54)

But they ham-strung her: then did they become full of regrets. (Surah Ash-Shuara, 157)

Those who had been despised will say to the arrogant ones: "Nay! it was a plot (of yours) by day and by night: Behold! Ye (constantly) ordered us to be ungrateful to Allah and to attribute equals to Him!" They will declare (their) repentance when they see the Penalty: We shall put yokes on the necks of the Unbelievers: It would only be a requital for their (ill) Deeds. (Surah Saba, 33)